Fastening for threadless pipes



r E. G. K. ANDERSON ,QFASTENING FOR THREADLESS PIPES Filed April 20. 1928 Patented Nov. 19, 19 29 UNITED STATES PATENT OFFICE 1mm G. ANDERSON, OIEYANSION, ILLINOIS, ASSIGNOB '10 APPLETON ELECTRIC f I A CORPORATION 01! ILLINOIS PG 303 THBEADLESS PIPES I Application nee A ril so, 1928. Serial No. 271,451.

The presentinvention has for its'obje'ct to produce a simple and novel means for positively securing a threadless pipe to aj'connection ,box or the like. a v

5 The various features of novelty whereby mge invention is characterized will hereinar be inted out with particularityin the I claims ut, -for a full understanding of my invention and of-its objects and advantages,

reference may be had to the following detailed description taken in connection with the accompanying drawing, wherein:

Figure 1 is an e evation of a connection box having a threadless pipe secured thereto in accordance with my invention; Fig. 2 is a section, on an enlarged scale on line 22 of Fig. 1; Fi 3 is a section taken on line 3-3 of Fig. 2; ig. 4 is a section of the coupling sleeve on the same plane, as that of Fig. 2; and

Fig. 5' is a-section on the same lane as Fig.

2, on a eatly enlar ed scale, s owing fragments 0 the pipe an coupling sleeve.

Referring to the drawing, 1 represents 1a tubular boss pro'ec'ting from a connection box 2 or the like and internally screw threaded. 3 is a threadlessipe smaller m diameter than the interior ameter of the boss. In order to secure the'pipe and box together, I employ -a split sleeve 4 slightly tapered and screwthreaded on the outside.

One end of the sleeve is flattened, as indicated at 5, or otherwise shaped to permit the sleeve to be turned by means ofa wrench or the like. It will thus be seen that when the pipe is inserted in the boss, with itsinner end spiral vallei, as indicated at 9 in Fig. 5. Consequently t e pipe will be interlocked with the sleeve. which in turn is interlocked with the boss on the box, and the pipe and the box cannot accidentally be separated by a mere pull on the pipe. v I

While I have illustrated and described with particularity.only a single of my invention,I do not deslre to be limitedto the exact structural details thusillustrated and described; but intend to cover all forms and arrangements which come within the referred form definitions of my invention constituting the appendedclaims.

I claim 1. In combination, aninternally screwthreaded member, a threadless pipe extending into said member, and a tapered s lit sleeve surrounding said pipe and adap be screwed into saidmembers, said sleeve having on the interior means to bite into the pipe along a spiral of the same pitch as the screwthreads on the sleeve.

2. In combination, an internally screw-,

threaded member, a threadless pipe extcnding into said member, and a tapered lit sleeve surrounding said pipe and adapte to fication.

ERNST G. K. ANDERSON.

; upon screwbeing the same as that of t e thread 8 on the exterior of the sleeve.

Therefore, when the sleeve is screwed in it actsas a-die, cutting or pressing hghtly 50 into the surface of the pine to form a shallow 

